Demountable tire-rim.



ALEXANDER DOW, OF NEW YORK, N.

ritieni Y., ASSIGNOR TO DOW RIM COMPANY. A CORPORATION OF NEW YORK.

DEMOUNT'ABLE TIRE-RIM.

Specification of Letters Patent.

Patented May 18, 1909.

Application led January 29, 1909. Y Serial No. 474,990.

To all whom it may concern:

'lie it known that l, ALnxAwnERDow, a citizen ot the Umted States of America, re-

siding at New York city, county and State lu the invention of in v aforesaid applieation the wedges or inclined surfaces'on the. tire rim and felly riui taper from a point at. or near the inner side of the wheel to the outer surfaces of the fellyfand tire rims. These outside rim surfaces are ordinarily painted or enameled to present. a neat appearance, and. where the wedges are constructed as above, the paint or enamel may become broken or rubbed ott' along the line of the joint between the tire and felly rims by careless handling of the tire rim in plac-r ing and changiijig tires.

To protect the finish of the outside rim surfaces and for the further purpose of strengthening the t'elly and tire rim joint., .l

r have, in the. present invention. lnrovided a tiange at the outside edge of the felly rim wedge.; and the wedge on the felly rim, instead of being continued to the outside surface of that rim, is stopped at the inside sin-face of this flange. The wedge of the tire rim, when the tire is in place on the wheel, lies behind this iange on thefcdlieso that. the line of the joint lfietween the Wedges' also lies behind the Hangs, instead of conw iinuing to the outside sairface of the Wheel. ()l' viousl v, the flan-ge is a strengthening element against lateral displacement. of the tire rim. .lhese and other objects of the invention will hereinafter more clearly appear in connection with the accompanying drawings, in which:

Figure l is a. -view in side elevation of the outside of a wheel with demountable tire rim assembled thereon, constructed according tothe present invention. Fig. 2 is a view in cross-section through the dei'nouutable tire rim; and wheel felly on the line X-X of Fig. l.

Referring tothe drawings, the Wheel telly l is shown as having attached thereto a, folly rim 2 on which, at intervals around thc wheel, are wedges 3. These wedges, yas shown in Fig. l, are tapered circumferentially and radially, and, as shown in Fig'. 2, are also tapered laterally from the base of a flange 4- on the felly rim outward and upward toward the outer surface of the Wheel telly. The wedges 3 may be made integral with the felly rim 2, but are shown in Fig. 2, as riveted to the felly rim by rivets 5. The demountable tire rim 6 has riveted thereto, as by rivets 7, at intervals around the Wheel, wedges S. These wedges, as shown in Fig. l., taper radially and conversely to the wedges 3 on the felly rim, and also taper laterally, as shown in Fig 2, so that the surfaces of the wedges 3 and 8 may engage each other at all points when the tire rim is in a locked position. The 'Wedges i 3 on the, wheel felly are spaced far enough apart to permit the Wedges 8 on the tire rirnto be passed between them so that the tire rim may be pushed laterally on to-and over the felly rim, whereupon the, tire 'rim is given a eirtnnferential movement, as described in my `aforesaid application, to bring the wedges 3 and 8 intofinterlocking engagement. The rims are then locked against rc.-

turn circumferential movement by means of a bolt 9, more specifically described in my application tiled in the United States Patent Oliice J an. 29, 1909, No. 474,989, locking device for demountablc tire rims.

As distinguished from the construction shown in my first named application, the wedges 3 on the wheel telly are provided with flanges l0, and the line of the joint between the wedges is stopped atA the .inside base of the flange l0, as shown in Fig. 2, instead ot being continued to the outside surface of the felly. The outside surface of the -telly rim therefore presents a. smooth un-y broken surface, and the paint or enamel thereon cannot be broken or rubbed off by the movement of the wedges over each other. The tianges 10, furthermore, have the function of strengthening the structure against lateral displacement of the tire rim, and to this end reinforce the lateral incline of the Wedges.

A circumferential movement of the two rims ally onto lthe felly rim, and then by a cirj into engagement with the first-named Wedge behind the4 flange; c

2. In a Wheel and demountable tire rim therefor,v a liXed felly rim provided With a vertical flange on the inside edge of the rim, Wedges on said felly rim inclined both cir-A cumferentially and laterally7 eaclr of said wedges having a vertical flange o'n the out?" side edge thereof, and Wedgesnon the tire rim adapted to be passed With the tire rim latercumferential movement of the Atire rimtq be moved into engagement With the felly rim Wedges behind .the outside flanges thereof.

,3. In a Wheel and demount-able tire rim therefor, thejfelly rim and the 'tire' rim, a flange on each sideofthe felly rim; a Wedge on the felly, rim between l@he inside and outside `langes thereof and tapering laterally from one of. said flanges ,to the otherLa Wedge on ,the'tire rimA adapted to be forced With the tire rim laterally `-ontoand over the felly rim; and of a size 'and shape t pass between the inside and outside felly rim flanges and engage the felly rimv Wedge when the tire rim is turnedcircumferentially on the felly rim. Signed by me atNew York city, county and' State of New- York, this 918th day of January 1909.. y

h V ALEX-ANDER DOW.

Witnessesz' Q EMMA W.RENN, FIJ. ERWIN. 

